[#8519] Bump log4j 2.12.3 for JDK7
[#8519] Bump log4j 2.12.3 for JDK7

minwoo-jung/pinpoint,emeroad/pinpoint,koo-taejin/pinpoint,naver/pinpoint,jaehong-kim/pinpoint,jaehong-kim/pinpoint,naver/pinpoint,koo-taejin/pinpoint,minwoo-jung/pinpoint,emeroad/pinpoint,emeroad/pinpoint,koo-taejin/pinpoint,koo-taejin/pinpoint,jaehong-kim/pinpoint,jaehong-kim/pinpoint,naver/pinpoint,koo-taejin/pinpoint,emeroad/pinpoint,koo-taejin/pinpoint,naver/pinpoint,emeroad/pinpoint,emeroad/pinpoint,minwoo-jung/pinpoint,minwoo-jung/pinpoint,minwoo-jung/pinpoint,minwoo-jung/pinpoint,jaehong-kim/pinpoint,jaehong-kim/pinpoint,naver/pinpoint